<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 200px;
            height: 100px;
            border: 1px solid #000000;
            margin: 20px;
        }
        #div1 {
            border: 10px solid blue;
            padding: 5px;
        }
        #div2 {
            padding: 5px;
        }
    </style>
</head>
<body>
    <div>
        <div id="div1">测试1</div>
    </div>
    <div id="div2">测试2</div>
    <div id="div3">测试3</div>
    <div id="div4">测试4</div>
</body>
</html>